stories that don't get told because we're moving too fast to see them. >> sreenivasan: this is as we mentioned a seven-year trip and when we take a look at that route, you're leaving africa, going through central area, up around china, across the bering strait, i'm assuming you're taking a boat and through the americas. one of those, as i'm noticing, the strait line goes right through iran. how do you get through that? >> i think that -- iran straddles an ancient migration path into central asia and ideally it would be wonderful to set off on foot across iran. i'm going to see what relations are like in the late 2015, hopefully they're well enough, good enough, to allow me to go through iran. >> sreenivasan: if there's a necessary detour, how long does that take to get around? >> it's a big place to walk around. part of the beauty, i think, of this long project is that there are going to be obstacles that i don't know answers to about how to get around them until i get there. and we'll see. sarin dip city a big part of this project. >> sreenivasan: what are the types of steps you've been taking? you've been planning this for a last couple years.